* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #fff9e6, #fffacd, #fff8dc);
    color: #333;
    min-height: 100vh;
}

.container {
    width: 100vw;
    height: 100vh;
    display: flex;
    flex-direction: column;
    border: 3px solid #000;
    background: linear-gradient(135deg, #fff9e6, #fffacd, #fff8dc);
}

/* Header Styles */
.header {
    display: flex;
    align-items: center;
    padding: 15px 20px;
    border-bottom: 2px solid #000;
    background: linear-gradient(135deg, #fff9e6, #fffacd);
    position: relative;
}

.hamburger-menu {
    display: flex;
    flex-direction: column;
    gap: 4px;
    cursor: pointer;
    margin-right: 20px;
    z-index: 100;
    transition: all 0.3s ease;
}

.hamburger-line {
    width: 25px;
    height: 3px;
    background-color: #000;
    border-radius: 2px;
    transition: all 0.3s ease;
}

.hamburger-menu.active .hamburger-line:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.hamburger-menu.active .hamburger-line:nth-child(2) {
    opacity: 0;
}

.hamburger-menu.active .hamburger-line:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
}

.page-title {
    font-family: "Arial Black", Arial, sans-serif;
    font-weight: bold;
    color: #000;
    font-size: 28px;
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    margin: 0;
}

/* Main Content Layout */
.main-content {
    display: flex;
    flex: 1;
    overflow: hidden;
    transition: all 0.3s ease;
}

/* History Sidebar */
.history-sidebar {
    width: 0;
    padding: 0;
    border-right: none;
    background: linear-gradient(135deg, #fff9e6, #fffacd);
    overflow-y: auto;
    overflow-x: hidden;
    transition: width 0.3s ease, padding 0.3s ease, border-right 0.3s ease;
    position: relative;
}

.history-sidebar.active {
    width: 280px;
    padding: 20px;
    border-right: 2px solid #000;
}

.history-label {
    font-size: 22px;
    color: #000;
    margin-bottom: 15px;
    font-weight: bold;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.history-sidebar.active .history-label {
    opacity: 1;
}

.history-content {
    opacity: 0;
    transition: opacity 0.3s ease;
}

.history-sidebar.active .history-content {
    opacity: 1;
}

.history-item {
    background: white;
    padding: 10px;
    margin-bottom: 8px;
    border-radius: 4px;
    border-left: 3px solid #1a237e;
    font-size: 13px;
    cursor: pointer;
    transition: all 0.2s;
}

.history-item:hover {
    background: #f0f8ff;
    transform: translateX(3px);
}

.history-item-title {
    font-weight: bold;
    margin-bottom: 3px;
}

.history-item-time {
    color: #666;
    font-size: 11px;
}

/* Function Blocks Panel */
.function-blocks-panel {
    width: 280px;
    padding: 20px;
    border-right: 2px solid #000;
    background: linear-gradient(135deg, #fff9e6, #fffacd);
    overflow-y: auto;
    transition: width 0.3s ease;
}

/* Action Blocks */
.action-block {
    margin-bottom: 20px;
    position: relative;
}

.block-header {
    background: linear-gradient(145deg, #1a237e, #283593, #3949ab);
    border: 2px solid #000;
    padding: 12px 15px;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-weight: bold;
    font-size: 16px;
    color: white;
    box-shadow: 6px 6px 12px rgba(0, 0, 0, 0.4);
    transition: all 0.3s ease;
    border-radius: 4px;
}

.block-header:hover {
    transform: translateY(-2px);
    box-shadow: 8px 8px 16px rgba(0, 0, 0, 0.5);
}

.block-header.active .dropdown-arrow {
    transform: rotate(180deg);
}

.dropdown-arrow {
    font-size: 12px;
    transition: transform 0.3s ease;
    color: white;
}

/* Dropdown Content */
.dropdown-content {
    display: none;
    margin-top: 10px;
    background: white;
    border: 1px solid #d3d3d3;
    border-radius: 4px;
    padding: 10px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.dropdown-content.active {
    display: block;
}

.dropdown-item {
    padding: 8px 12px;
    cursor: pointer;
    color: #000080;
    font-size: 14px;
    border-bottom: 1px solid #eee;
    transition: background 0.2s;
    border-radius: 3px;
}

.dropdown-item:hover {
    background: #f5f5f5;
}

.dropdown-item:last-child {
    border-bottom: none;
}

/* Filter Inputs */
.filter-inputs {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.filter-inputs label {
    font-weight: 600;
    font-size: 13px;
    color: #333;
    margin-top: 5px;
}

.filter-input {
    padding: 8px;
    border: 1px solid #d3d3d3;
    border-radius: 4px;
    font-size: 14px;
    width: 100%;
    color: #000080;
}

.filter-input:focus {
    outline: none;
    border-color: #1a237e;
}

.apply-button {
    padding: 10px;
    background: linear-gradient(145deg, #1a237e, #283593);
    color: white;
    border: 1px solid #000;
    border-radius: 4px;
    cursor: pointer;
    font-weight: bold;
    transition: all 0.3s ease;
    margin-top: 8px;
}

.apply-button:hover {
    background: linear-gradient(145deg, #283593, #3949ab);
    transform: translateY(-1px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}

.clear-btn {
    background: #d32f2f !important;
}

.clear-btn:hover {
    background: #b71c1c !important;
}

.add-filter-btn {
    padding: 8px 12px;
    background: #4caf50;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 13px;
    font-weight: bold;
    margin-top: 8px;
    transition: all 0.3s ease;
}

.add-filter-btn:hover {
    background: #45a049;
}

/* Sub-dropdown */
.sub-dropdown {
    display: none;
    margin-top: 8px;
    padding: 10px;
    background: #f9f9f9;
    border: 1px solid #d3d3d3;
    border-radius: 4px;
}

.sub-dropdown.active {
    display: block;
}

.filter-group, .sort-group {
    background: #f9f9f9;
    padding: 10px;
    margin-top: 8px;
    border-radius: 4px;
    border: 1px solid #ddd;
}

/* Content Panel */
.content-panel {
    flex: 1;
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 20px;
    background: linear-gradient(135deg, #fff9e6, #fffacd);
    overflow: hidden;
}

/* Upload Section */
.upload-section {
    display: flex;
    align-items: center;
    gap: 15px;
}

.upload-icon {
    width: 40px;
    height: 40px;
    border: 2px solid #000;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #87ceeb;
    color: #000;
    flex-shrink: 0;
}

.upload-icon svg {
    stroke: #000;
}

.file-drop-zone {
    flex: 1;
    border: 2px dashed #0066cc;
    border-radius: 8px;
    padding: 30px;
    text-align: center;
    cursor: pointer;
    background: #f0f8ff;
    transition: all 0.3s ease;
    color: #0066cc;
    font-weight: 500;
}

.file-drop-zone:hover,
.file-drop-zone.drag-over {
    background: #e0f0ff;
    border-color: #0052a3;
}

.file-drop-zone p {
    margin-bottom: 5px;
}

.file-drop-zone small {
    color: #666;
    font-size: 12px;
}

/* Display Area */
.display-area {
    flex: 1;
    border: 2px solid #0066cc;
    border-radius: 8px;
    padding: 20px;
    position: relative;
    background: white;
    overflow: auto;
    min-height: 400px;
}

.undo-icon, .download-icon {
    position: absolute;
    top: 20px;
    width: 35px;
    height: 35px;
    border: 2px solid #000;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: white;
    cursor: pointer;
    z-index: 5;
    transition: all 0.2s;
}

.undo-icon {
    right: 70px;
}

.undo-icon svg {
    stroke: #000;
}

.download-icon {
    right: 20px;
    background: linear-gradient(135deg, #e8f4f8, #d0e8f0);
}

.download-icon svg {
    stroke: #000;
}

.undo-icon:hover, .download-icon:hover {
    transform: scale(1.1);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}

/* Data Table */
.data-table-container {
    width: 100%;
    overflow: auto;
    margin-top: 40px;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
}

.data-table th {
    background: #1a237e;
    color: white;
    border: 1px solid #000;
    padding: 12px;
    text-align: left;
    font-weight: bold;
    position: sticky;
    top: 0;
    z-index: 2;
}

.data-table td {
    border: 1px solid #ccc;
    padding: 10px 12px;
    background: white;
}

.data-table tr:nth-child(even) td {
    background: #f9f9f9;
}

.data-table tr:hover td {
    background: #f0f8ff;
}

.data-table td.highlight-null {
    background: #ffff99 !important;
}

.data-table td.highlight-duplicate {
    background: #ffcccc !important;
}

/* Pagination */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 10px;
    margin-top: 15px;
    padding: 10px;
}

.pagination button {
    padding: 8px 12px;
    background: #1a237e;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-weight: bold;
    transition: all 0.3s ease;
}

.pagination button:disabled {
    background: #ccc;
    cursor: not-allowed;
}

.pagination button:hover:not(:disabled) {
    background: #283593;
}

.pagination span {
    font-weight: bold;
    color: #1a237e;
}

/* Charts */
.visualization-section {
    margin-top: 30px;
    padding-top: 20px;
    border-top: 2px solid #0066cc;
}

.chart-container {
    margin: 20px 0;
    padding: 20px;
    background: white;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    position: relative;
}

.chart-canvas {
    max-height: 400px;
}

.chart-actions {
    position: absolute;
    top: 10px;
    right: 10px;
    display: flex;
    gap: 8px;
}

.chart-action-btn {
    padding: 8px 15px;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-weight: bold;
    font-size: 12px;
    transition: all 0.3s ease;
}

.download-chart-btn {
    background: #4caf50;
}

.download-chart-btn:hover {
    background: #45a049;
}

.delete-chart-btn {
    background: #d32f2f;
}

.delete-chart-btn:hover {
    background: #b71c1c;
}

/* Statistics */
.stats-container {
    margin: 20px 0;
    padding: 20px;
    background: white;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.stats-container h3 {
    color: #1a237e;
    margin-bottom: 15px;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 15px;
}

.stat-item {
    padding: 15px;
    background: #f0f8ff;
    border-radius: 4px;
    border-left: 3px solid #1a237e;
}

.stat-label {
    font-size: 12px;
    color: #666;
    margin-bottom: 5px;
    text-transform: uppercase;
}

.stat-value {
    font-size: 20px;
    font-weight: bold;
    color: #1a237e;
}

/* Modal Styles */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    overflow: auto;
}

.modal.active {
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-content {
    background: white;
    border-radius: 8px;
    width: 90%;
    max-width: 600px;
    max-height: 85vh;
    display: flex;
    flex-direction: column;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    position: relative;
}

.modal-header {
    padding: 20px;
    border-bottom: 2px solid #ddd;
    background: linear-gradient(135deg, #fff9e6, #fffacd);
    border-radius: 8px 8px 0 0;
    position: relative;
}

.modal-header h2 {
    margin: 0;
    color: #1a237e;
    font-size: 22px;
}

.modal-close {
    position: absolute;
    top: 15px;
    right: 20px;
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
    color: #666;
    transition: color 0.3s;
}

.modal-close:hover {
    color: #000;
}

.modal-body {
    padding: 20px;
    overflow-y: auto;
    flex: 1;
}

.modal-footer {
    padding: 15px 20px;
    border-top: 2px solid #ddd;
    display: flex;
    justify-content: flex-end;
    gap: 10px;
    background: #f9f9f9;
    border-radius: 0 0 8px 8px;
}

.cancel-button {
    padding: 10px 20px;
    background: #fff;
    color: #333;
    border: 2px solid #ccc;
    border-radius: 4px;
    cursor: pointer;
    font-weight: bold;
    transition: all 0.3s ease;
}

.cancel-button:hover {
    background: #f0f0f0;
    border-color: #999;
}

/* Checkbox Items */
.checkbox-item {
    display: flex;
    align-items: center;
    padding: 8px;
    margin: 5px 0;
}

.checkbox-item input[type="checkbox"] {
    width: 18px;
    height: 18px;
    margin-right: 10px;
    cursor: pointer;
}

.checkbox-item label {
    cursor: pointer;
    user-select: none;
}

.checkbox-group {
    max-height: 300px;
    overflow-y: auto;
    border: 1px solid #ddd;
    padding: 10px;
    border-radius: 4px;
    margin-top: 10px;
}

/* Review Items */
.review-list {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.review-item {
    padding: 15px;
    background: #f9f9f9;
    border: 1px solid #ddd;
    border-radius: 6px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.review-item-content {
    flex: 1;
}

.review-item-row {
    font-size: 12px;
    color: #666;
    margin-bottom: 5px;
}

.review-item-change {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-top: 8px;
}

.review-old {
    padding: 5px 10px;
    background: #ffe0e0;
    border: 1px solid #ffb3b3;
    border-radius: 4px;
    text-decoration: line-through;
    color: #c00;
}

.review-new {
    padding: 5px 10px;
    background: #e0ffe0;
    border: 1px solid #b3ffb3;
    border-radius: 4px;
    color: #080;
    font-weight: bold;
}

.review-arrow {
    color: #666;
    font-weight: bold;
}

.review-item-checkbox {
    margin-left: 15px;
}

.review-item-checkbox input[type="checkbox"] {
    width: 20px;
    height: 20px;
    cursor: pointer;
}

/* Summary Stats */
.summary-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 10px;
    margin-bottom: 20px;
}

.summary-stat {
    padding: 15px;
    background: white;
    border: 2px solid #1a237e;
    border-radius: 6px;
    text-align: center;
}

.summary-stat-value {
    font-size: 24px;
    font-weight: bold;
    color: #1a237e;
    margin-bottom: 5px;
}

.summary-stat-label {
    font-size: 12px;
    color: #666;
    text-transform: uppercase;
}

/* Duplicates List */
.duplicates-list {
    max-height: 400px;
    overflow-y: auto;
    margin-top: 15px;
}

.duplicate-row-item {
    padding: 12px;
    background: #fff3cd;
    border: 1px solid #ffc107;
    border-radius: 4px;
    margin-bottom: 10px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.duplicate-row-info {
    flex: 1;
}

.duplicate-row-data {
    font-size: 13px;
    color: #333;
    margin-top: 5px;
}

.duplicate-row-checkbox {
    margin-left: 15px;
}

.duplicate-row-checkbox input[type="checkbox"] {
    width: 20px;
    height: 20px;
    cursor: pointer;
}

/* Messages */
.success-message {
    padding: 15px;
    background: #d4edda;
    border: 2px solid #28a745;
    border-radius: 6px;
    margin-bottom: 15px;
    color: #155724;
}

.error-message {
    padding: 15px;
    background: #f8d7da;
    border: 2px solid #dc3545;
    border-radius: 6px;
    margin-bottom: 15px;
    color: #721c24;
}

.warning-message {
    padding: 15px;
    background: #fff3cd;
    border: 2px solid #ffc107;
    border-radius: 6px;
    margin-bottom: 15px;
    color: #856404;
}

.success-message strong,
.error-message strong,
.warning-message strong {
    display: block;
    margin-bottom: 5px;
    font-size: 16px;
}

/* Responsive */
@media (max-width: 768px) {
    .main-content {
        flex-direction: column;
    }
    
    .function-blocks-panel {
        width: 100%;
        border-right: none;
        border-bottom: 2px solid #000;
        max-height: 300px;
    }
    
    .history-sidebar.active {
        width: 100%;
        border-right: none;
        border-bottom: 2px solid #000;
    }
    
    .page-title {
        font-size: 20px;
    }
    
    .modal-content {
        width: 95%;
        max-height: 90vh;
    }
}